content: /*
   * Copyright 2017 David Karnok
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package hu.akarnokd.reactive4javaflow.impl.operators;
  
  import hu.akarnokd.reactive4javaflow.*;
  import hu.akarnokd.reactive4javaflow.functionals.CheckedFunction;
  
  import java.util.concurrent.Flow;
  
  /**
   * Concatenates the generated Publishers on each rail.
   *
   * @param <T> the input value type
   * @param <R> the output value type
   */
  public final class ParallelConcatMap<T, R> extends ParallelFolyam<R> {
  
      final ParallelFolyam<T> source;
  
      final CheckedFunction<? super T, ? extends Flow.Publisher<? extends R>> mapper;
  
      final int prefetch;
  
      final boolean delayError;
  
      public ParallelConcatMap(
              ParallelFolyam<T> source,
              CheckedFunction<? super T, ? extends Flow.Publisher<? extends R>> mapper,
                      int prefetch, boolean delayError) {
          this.source = source;
          this.mapper = mapper;
          this.prefetch = prefetch;
          this.delayError = delayError;
      }
  
      @Override
      public int parallelism() {
          return source.parallelism();
      }
  
      @Override
      public void subscribeActual(FolyamSubscriber<? super R>[] subscribers) {
          int n = subscribers.length;
  
          @SuppressWarnings("unchecked")
          final FolyamSubscriber<T>[] parents = new FolyamSubscriber[n];
  
          for (int i = 0; i < n; i++) {
              parents[i] = FolyamConcatMap.createSubscribe(subscribers[i], mapper, prefetch, delayError);
          }
  
          source.subscribe(parents);
      }
  }
  